HBase Java 客户端无法访问远程 HBase 区域服务器

Posted 2023-04-18

【中文标题】HBase Java 客户端无法访问远程 HBase 区域服务器

【英文标题】：HBase Java client can't reach to remote HBase region server

【发布时间】：2014-02-21 02:50:43

【问题描述】：

我已经在服务器中启动了一个独立的 HBase(192.168.36.42)

客户端

package com.test;

import java.util.ArrayList;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;

public class HBaseClient 

    public static void main(String[] args) throws Exception 
        Configuration config = HBaseConfiguration.create();
        System.out.println("IP Address : " + config.get("hbase.zookeeper.quorum"));

        HTable table = new HTable(config, "test_table");
        ArrayList<Put> data = new ArrayList<Put>();
        Put p = new Put("row3".getBytes());
        p.add("field1".getBytes(), "qualifier".getBytes(), "value".getBytes());

        table.put(data);
        table.flushCommits();

        data.clear();
        table.close();
        System.out.println("close table");
    

这是客户端的控制台输出：

14/02/26 16:21:31 INFO ipc.HBaseRPC: Server at BJ-NQ-V-CR002/192.168.36.42:44525 could not be reached after 1 tries, giving up.
14/02/26 16:21:33 INFO ipc.HBaseRPC: Server at BJ-NQ-V-CR002/192.168.36.42:44525 could not be reached after 1 tries, giving up.
14/02/26 16:21:35 INFO ipc.HBaseRPC: Server at BJ-NQ-V-CR002/192.168.36.42:44525 could not be reached after 1 tries, giving up.
14/02/26 16:21:37 INFO ipc.HBaseRPC: Server at BJ-NQ-V-CR002/192.168.36.42:44525 could not be reached after 1 tries, giving up.

客户端/etc/host:

192.168.36.42   BJ-NQ-V-CR002

hbase-site.xml

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
  <property>
    <name>hbase.zookeeper.quorum</name>
    <value>BJ-NQ-V-CR002</value>
  </property>
  <property>
    <name>hbase.zookeeper.property.clientPort</name>
    <value>2181</value>
  </property>
</configuration>

服务器端

hbase(main):003:0> describe 'test_table'
DESCRIPTION                                                                                                        ENABLED                                                        
 'test_table', NAME => 'field1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',  true                                                           
 VERSIONS => '3', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'false',                                                                 
 BLOCKSIZE => '65536', IN_MEMORY => 'false', ENCODE_ON_DISK => 'true', BLOCKCACHE => 'true', NAME => 'field2', D                                                                
 ATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSIONS => '3', COMPRESSION => 'N                                                                
 ONE', MIN_VERSIONS => '0', TTL => '2147483647', KEEP_DELETED_CELLS => 'false', BLOCKSIZE => '65536', IN_MEMORY =>                                                                
  'false', ENCODE_ON_DISK => 'true', BLOCKCACHE => 'true'                                                                                                                        
1 row(s) in 0.1680 seconds

/etc/hosts

127.0.0.1  BJ-NQ-V-CR002
127.0.0.1  localhost localhost.localdomain
192.168.36.42 BJ-NQ-V-CR002

hbase-site.xml

<configuration>
  <property>
    <name>hbase.zookeeper.quorum</name>
    <value>BJ-NQ-V-CR002</value>
  </property>
  <property>
    <name>hbase.rootdir</name>
    <value>file:///root/hbase-0.94.16/data/hbase</value>
  </property>
  <property>
    <name>hbase.zookeeper.property.dataDir</name>
    <value>/root/hbase-0.94.16/data/zookeeper</value>
  </property>
</configuration>

区域服务器

BJ-NQ-V-CR002

【参考方案1】：

您的日志没有显示任何超时异常，只是一些 zookeeper 输出。不过，我以前见过这个。

检查您是否可以从 hbase shell 中put。您可能只有一个为该表提供服务的区域服务器，并且它存在问题。有问题的区域服务器已关闭或表文件在 hdfs 上不可用。

重启区域服务器并查看其日志

【讨论】：

我可以直接从 hbase shell put 数据到 test_table。我是 HBase 新手，我以独立模式启动 HBase（这意味着主服务器和区域服务器在同一台机器上）